About this 3D model

I wanted a toilet paper roll that matched the design of our door knobs, so I designed this. It's an almost perfect match, except I didn't manage to get the outer angle to round a little bit, still don't know how to do that. I deliberately designed it without holes for screws, for aesthetics, but it has a very nice and large base, which leaves plenty of room for industrial double sided tape or glue. I'm using Mammoth tape and it's sticking just fine. Update: Mine broke b/c of the thin base, so I thickened the base and reinforced it a bit. Two versions now available.